Scancell : Interim Report 31st October 2021

26 January 2022

Scancell Holdings plc

("Scancell" or the "Company")

Interim Results for the 6 months ended 31 October 2021

Strong operational progress with two programmes now in the clinic

Scancell Holdings plc (AIM: SCLP), the developer of novel immunotherapies for the treatment of cancer and infectious disease, announces its interim results for the 6 months ended 31 October 2021.

Highlights (including post period):

Vaccines:

• First subject dosed in the Company's COVID-19 vaccine Phase 1 clinical trial (COVIDITY) in South Africa, with 16 patients having been recruited to date.
• Selection of PharmaJet's Needle-free Injection System to administer the Company's two SARS-CoV- 2 vaccine candidates.
• Modi-1Phase 1/2 clinical trial application approved by the UK's Medicines and Healthcare Products Regulatory Authority (MHRA) and challenges previously associated with formulation of the citrullinated enolase peptide successfully resolved.
• Four clinical centres in the UK now operational in the Company's SCIB1 Phase 2 clinical trial and, post period, the first patient was dosed at Churchill Hospital, Oxford University Hospitals Trust.

Antibodies:

• Continued the development of a unique, rich pipeline of tumour-specificanti-glycan antibodies with the initial aim of generating early-stage clinical data, either alone or in combination with potential strategic partners.
• Applied AvidiMab™ technology to the Company's internal programmes to engineer and enhance potency of its anti-glycan antibodies, ImmunoBody® cancer products and COVID-19 vaccine candidates.

Corporate:

• Professor Lindy Durrant, founder, Board Director and Chief Scientific Officer of Scancell, appointed as Chief Executive Officer of Scancell Holdings plc in July 2021.
• Expanded the Group's R&D capabilities post period by taking new laboratory and office space in the
  Bellhouse Building at The Oxford Science Park.

Financial:

• The Company's capital structure has been improved through the extension of the redemption dates of the outstanding unsecured Convertible Loan Notes ("CLNs") issued by the Company in 2020.
• Reported profit for the 6-month period to 31 October 2021 of £3.2 million (versus 6-month period to 31 October 2020 loss of £3.86 million) benefited substantially from a non-cash gain to the holding value of the CLNs. The redemption dates for the CLNs were extended to 2025. The loss after tax excluding this gain was £3.96 million (versus 6-month period to 31 October 2020 loss of £3.86 million).
• Group cash balance at 31 October 2021 was £35.6 million (April 2021: £41.1 million).

Prof Lindy Durrant, Chief Executive Officer, Scancell, commented:

"We are pleased to report a period of strong operational progress for Scancell with two vaccine candidates now in the clinic. In October 2021, we initiated our COVIDITY programme in South Africa and to date have

recruited 16 patients with safety and immunogenicity data due during H1 2022. Post-period, we successfully dosed our first patient in the SCIB1 Phase 2 clinical trial and look forward to recruitment accelerating once the impact of COVID-19 on the NHS is reduced. We have also continued to progress our antibody platform whilst expanding operationally with new laboratory and office facilities in Oxford. We would like to thank our shareholders for their continued support over the past 6 months and look forward to updating the market on future progress."

A full copy of the announcement can be found on the Scancell website: www.scancell.co.uk

This announcement contains inside information for the purposes of Article 7 of Regulation (EU) 596/2014 (MAR).

About Scancell

Scancell is developing novel immunotherapies for the treatment of cancer based on its technology platforms, ImmunoBody®, Moditope® and AvidiMab™, with four products in multiple cancer indications and development of a vaccine for COVID-19.

ImmunoBody® vaccines target dendritic cells and stimulate both CD4 and CD8 T cells with the ability to identify, target and eliminate cancer cells. These cancer vaccines have the potential to be used as monotherapy or in combination with checkpoint inhibitors and other agents. The Directors believe that this platform has the potential to enhance tumour destruction, prevent disease recurrence and extend survival.

DNA vaccine against COVID-19: As research data emerges, it is becoming increasingly clear that the induction of potent and activated T cells may play a critical role in the development of long-term immunity and clearance of virus-infected cells. Initial research is underway and Scancell has initiated a Phase 1 clinical trial known as COVIDITY in October 2021.

Moditope® represents a completely new class of potent and selective immunotherapy agents based on stress- induced post-translational modifications (siPTM). Examples of such modifications are citrullination, an enzyme- based conversion of arginine to citrulline, and homocitrullination (or carbamylation), in which lysine residues are converted to homocitrulline. Expression of peptides containing these modifications have been demonstrated to induce potent CD4 cytotoxic T cells to eliminate cancer. The Directors believe that this platform has the potential to eradicate hard to treat solid tumours.

AvidiMab™ has broad potential to increase the avidity or potency of any therapeutic monoclonal antibody (mAb) including those being developed for autoimmune diseases, as well as cancer. Scancell's development pipeline includes mAbs against specific tumour-associated glycans with superior affinity and selectivity profiles, that have now been further engineered using the Company's AvidiMab™ technology; this confers the Scancell mAbs with the ability to directly kill tumour cells. The tumour-specific mAbs can also be used to deliver cytotoxic payload to cancer or to redirect T cells.

CHAIRMAN'S STATEMENT

I am pleased to report the Group's interim results for the 6 month period ended 31 October 2021 and provide a summary of progress that has been made across our vaccine and antibody platforms.

VACCINES

Moditope® platform

Moditope® is a versatile proprietary cancer vaccine platform that targets stress-inducedpost-translational modifications (siPTMs) of proteins. This discovery has allowed the Company to develop a completely new class of potent and selective therapeutic vaccines. Examples of such modifications include citrullination, an enzyme-based conversion of arginine to citrulline, and homocitrullination, in which lysine residues are converted to homocitrulline. Expression of peptides containing these modifications have been demonstrated to induce potent CD4 cytotoxic T cells that induce anti-tumour activity without any associated toxicity.

Modi-1

Modi-1, which targets citrullinated cancer antigens, is the first therapeutic vaccine candidate to emerge from Scancell's Moditope® platform. The Company has received MHRA approval for a Phase 1/2 clinical trial in patients with solid tumours, including triple negative breast cancer, ovarian cancer, renal cancer and head and neck cancer. The challenges associated with formulation of the citrullinated enolase peptide have now been successfully resolved and the Company expects to start clinical trials during H1 2022 with safety and immunological data due in H2 2022 and efficacy data being received in 2023. Like other companies within the sector, Scancell is finding that the set up and running of clinical trial sites in the UK is being impacted by staff shortages in the NHS caused by COVID-19, which the Company plans to mitigate by increasing the number of trial sites, widening the patient selection criteria and minimising hospital visits for enrolled patients.

Modi-2

Modi-2, which targets homocitrullinated cancer antigens, is the second therapeutic vaccine candidate from the Company's Moditope® platform and has the potential to address different cancer indications to Modi-1, including tumours with a particularly immunosuppressive environment. Under the Group's current assumptions, it is anticipated that Good Manufacturing Practice (GMP) manufacture of the Modi-2 product will start in 2022, with clinical development then commencing in 2023.

ImmunoBody® platform

Scancell's ImmunoBody® immunotherapy platform uses the body's immune system to identify, attack and destroy tumours. This is achieved by delivering a DNA plasmid to enhance the uptake and presentation of cancer antigens to harness high avidity T cell responses. Each ImmunoBody® vaccine can be designed to target a particular cancer in a highly specific manner, offering the potential for enhanced efficacy and safety compared with more conventional approaches. These vaccines have the potential to be used as monotherapy or in combination with checkpoint inhibitors and other agents. The Directors believe that this platform has the potential to enhance tumour destruction, prevent disease recurrence and extend survival.

Scancell's ImmunoBody® vaccine approach can also be exploited to induce immune responses against infectious diseases. As research data emerged at the beginning of the COVID-19 pandemic, it was clear that the induction of potent and activated T cells may play a critical role in the development of long-term immunity and clearance of virus-infected cells. Scancell is therefore also using its proven cancer vaccine concept to design a vaccine against SARS-CoV-2, the virus that causes COVID-19.

COVIDITY

The COVIDITY programme, focusing on the Company's novel COVID-19 vaccine candidates SCOV1 and SCOV2, is a collaboration between Scancell and scientists at the Centre for Research on Global Virus Infections and the new Biodiscovery Institute at the University of Nottingham, and Nottingham Trent University. To date, the programme has received c.£2 million non-dilutive funding from Innovate UK, the UK's Innovation Agency. The COVIDITY programme is based on Scancell's ImmunoBody® platform and is aimed at developing

1. next generation DNA-basedCOVID-19 vaccine administered using PharmaJet's needle-free delivery systems. The COVIDITY vaccines have been designed to elicit more enduring immunity to conserved antigens compared to the current mRNA-based vaccines, and also to allow COVID-19 vaccines against new SARS- CoV variants to be generated quickly when they emerge.

The Phase 1 clinical study started on 5 October 2021 in South Africa and 16 patients have been recruited to date with no safety concerns. Due to the high case numbers of the Omicron variant in South Africa, recruitment has been slow but now the country's wave has passed, the Company anticipates recruitment of subjects will speed up again and safety and immunogenicity data is still expected to be available in H1 2022. Given the

large size of later stage trials, the Company intends to partner this programme once it has generated proof of concept data from the Phase 1 trial.

SCIB1

SCIB1 is currently being evaluated in a Phase 2 clinical trial in the UK in combination with the checkpoint inhibitor Keytruda® for the treatment of metastatic melanoma. Patient recruitment has been impacted by a combination of the ongoing COVID-19 pandemic and recent changes in the treatment of metastatic melanoma whereby most patients receive treatment with a combination of checkpoint inhibitors and ipilimumab rather than Keytruda® alone. However, recruitment has re-started following approval of a protocol amendment to reduce patient hospital visits and allow remote monitoring of the trial.

Four clinical centres in the UK are now operational and actively screening patients, with additional trial sites planned. Since the period end, the Company announced the enrolment and treatment of the first patient in its SCIB1 Phase 2 clinical trial at the Churchill Hospital, Oxford University Hospitals Trust.

iSCIB1+

The Company has also been developing iSCIB1+, an AvidiMab™ modified version of SCIB1, which is expected to increase both the potency of SCIB1 and extend patent life. The modification also includes multiple epitopes so it can be used to treat all patients rather than be limited to the 40% of patients who have the appropriate HLA type for treatment with SCIB1. Given the significant improvements in potency, utility and patent life with iSCIB1+, the Company is currently evaluating its strategic options for the current SCIB1 programme which could include changes to the product, protocol and delivery system and will update the market in during 2022 with regards to its strategy.

ANTIBODIES

Anti-glycan antibodies

Scancell has used its in-house scientific understanding and expertise to develop an enabling technology platform which can be employed to produce differentiated anti-cancer monoclonal antibodies (mAbs) that target glycans rather than proteins or lipids. The Company has been building a pipeline of differentiated anti- cancer mAbs and currently has five novel mAbs in early-stage development. Four of these mAbs directly target solid tumours including pancreatic, neuroendocrine, colorectal and gastric and will be used to target drugs (antibody drug conjugates; ADC), T cells (redirected T cells) or cells (chimeric antigen receptor therapies; CAR). The fifth mAb targets a checkpoint activator on T cells. The Group intends to achieve these developments through strategic partnerships with third parties.

Scancell is also using its unique mAb-generating platform to identify more antibodies against unique anti- cancer glycan targets.

AvidiMab™

AvidiMab™ is a versatile platform technology that has been developed by Scancell and can enhance the avidity and thereby the potency of any antibody.

Scancell has used AvidiMab™ in its internal programmes to:

• Engineer the anti-glycan mAbs to improve their ability to directly kill tumour cells.
• Engineer other mAbs to enhance their potency and/or extend their patent lifetime.
• Increase the breadth of response and potency of Scancell's ImmunoBody® cancer products.
• Increase the potency of the T cell response in Scancell's COVID-19 vaccine which in turn should lead to improvements in long-term protection and immunological memory.

Scancell is planning to increase the value of this rich pipeline of products through the generation of early-stage clinical data, either alone or in combination with strategic partners.

CORPORATE

As reported in the prior year-end financial statements, on 28 July 2021, Professor Lindy Durrant, founder, Board Director and Chief Scientific Officer (CSO) of the Group was appointed as Chief Executive Officer (CEO) of Scancell Holdings plc, following Dr Cliff Holloway's decision to step down as a Board Director and CEO. The Board firmly believes that her strategic insight, commitment to the Company and strong leadership skills will deliver significant value to the business and shareholders.

During the period, the Group entered into a 5-year lease agreement with The Oxford Science Park for additional laboratory and office space in the Bellhouse Building at the Oxford Science Park. These new premises, which are complementary to Scancell's laboratories in the Biodiscovery Institute at the University of Nottingham, will allow the Company to further accelerate the development of its portfolio of immunotherapies.

FINANCIAL REVIEW

Profit or Loss and Other Comprehensive Income Statement

The Group made an operating loss for the 6-month period to 31 October 2021 of £5.4 million (6-month period to 31 October 2020: loss of £2.8 million).

Development expenditure has increased to £4.03 million (2020 £2.01 million). This is largely as a result of the increase in GMP manufacturing and clinical costs for the COVIDITY programme which commenced on 1 October 2020 together with additional development costs on other projects as the country came out of lock- down.

The increase in administrative expenditure to £1.92 million (2020: £0.97 million) reflects increased salary and recruitment costs together with additional depreciation and amortisation charges as a result of expenditure on equipment, including the new laboratory in Oxford.

The Innovate (UK) grant income receivable of £0.55 million (2020: £0.17million) relates to expenditure incurred by Scancell on the development of a COVID-19 vaccine for the six months to 31 October 2021 whereas the 2020 expenditure was for just one month

Interest payable of £1.73 million (2020: £0.22 million) relates to the interest on the Convertible Loan Notes ('CLNs'). The interest is significantly higher because the November 2020 CLNs totalling £17.9 million had not been issued at 31 October 2020.

The finance credit of £2.44 million (2020: expense £1.33 million) relates to the derivative liability and is the fair value adjustment of the derivative liability at the respective period ends. The finance expense is not a cash item and has no impact upon the Company's cashflow.

The gain on the substantial modification of the CLNs amounting to £7.17 million (2020: £nil) arises from accounting adjustments from the replacement of the CLNs in existence at 27 October 2021 with new CLNs with a later maturity data. These adjustments have no impact upon Scancell's cashflows.

The profit before taxation for the period amounted to £2.49 million (2020: loss £4.35 million). The R&D tax

credit increased to £0.72 million (2020: £0.50 million) as a result of increased level of development expenditure claimable in the 6-month period.

Overall, the profit for the 6-month period was £3.2 million (2020: loss £3.86 million).

Statement of Financial Position

At 31 October 2021, the net assets of the Group amounted to £22.69 million (30 April 2021: £19.49 million)

including cash at bank of £35.57 million (30 April 2021: £41.11 million).

During the year there was additional expenditure of £0.77 million on laboratory equipment in Oxford which form part of the Tangible Fixed assets. The new lease for laboratory and offices in Oxford was recognised as a right of use asset and a lease liability increasing additions and the lease liability by £1.25 million.

Current assets include tax receivable due at the end of the period of £2.00 million (April 2021: £2.59 million) and relates to the R&D tax credit for the year ended 30 April 2021 amounting to £1.33 million and an estimate of the amount recoverable at 31 October 2021.